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Solar panel cost in Rhondda Cynon Taf (CF43)

See realistic solar installation costs, savings and payback for CF43 (Rhondda Cynon Taf) in under a minute using official UK data. Start with the calculator, then get a no-obligation quote from an MCS-certified installer. You can also ask the SolarByPostcode assistant to sanity-check your roof, bills and plans.

Solar Calculator

Change the settings below to see how costs and savings work for your situation.

System Size

Roof Direction

Battery Storage

Export Value

Your Numbers

Break-even
12.0 years
After this, it's pure profit
Upfront Cost
£7,307
What you pay to get started
Annual Benefit
£609
What you save every year
Profit Over 25 Years
£7,912
After paying itself off, you're this much ahead

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How we calculate this

Solar generation: Based on typical south-facing roof at 35° angle. We account for weather, dirt, and system losses (14%).

How much you'll use directly:

  • Without battery: You'll use about 40% of what you generate. The rest gets sold back to the grid.
  • With 5 kWh battery: You'll use about 70% (battery stores extra for evening use).
  • With 10 kWh battery: You'll use about 75% (more storage means less exported).
  • Panel-only payback: The official cost per kW is lower above 4 kW, so a 5–6 kW system can pay back a little faster than a 3–4 kW system on otherwise identical assumptions.
  • Battery & payback: Batteries raise self-use and cut bills, but added hardware cost often lengthens break-even at typical UK rates.
  • When a battery can still make sense:
    • Evening-heavy usage patterns
    • Time-of-use tariffs / cheap night rates
    • Low export rate vs. high unit rate
    • Heat pump or EV charging synergy
    • Optional backup/resilience (system-dependent)
    • Lower evening-hour CO₂ vs. grid

Panel costs: Uses March 2026 TIC mean installation costs: £1,827/kW up to 4 kW and £1,628/kW above 4 kW.

Other costs: Battery prices are modelled at £700 per kWh. Export tariffs vary by supplier (usually 5–15p per kWh).

Grid connection: Systems up to about 3.7 kW typically need just a notification (G98). Larger systems may need permission (G99).

These are typical values based on average usage patterns. Your actual results will vary based on your roof, shading, and how you use electricity.

Your area in context

In South Wales, the current unit rate is 26.33p/kWh with a 57.84p/day standing charge. Your postcode’s south-facing sunshine yield is 921 kWh/kW — 48 below the regional median (968).

Read the full story

A typical roof here lands around 4.0 kW, with most eligible homes comfortably fitting within 3–6 kW. Each kilowatt of panels produces roughly 921 kWh per year on a south-facing roof. We value self-used electricity at 26.3p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
26.3p/kWh
Standing charge
57.8p/day
Sunshine yield (south)
921 kWh/kW
Export price (baseline)
10p/kWh

Browse the scenarios below. Each battery size has its own expand — open the one that matches your plan (or just explore). For each system size (2–8 kW) we show annual output, how much you use directly, what gets exported, annual benefit, upfront cost, break-even, and a 20-year net. Negative numbers are possible — that’s the honest trade-off when adding more battery than your usage profile justifies.

No battery 5 kW example → Annual benefit: £761, Upfront: £9,134, Break-even: 12.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1841 kWh 736 kWh 1105 kWh £194 £110 £304 £3,654 12.0 yrs £2,434
3 kW 2762 kWh 1105 kWh 1657 kWh £291 £166 £457 £5,481 12.0 yrs £3,651
4 kW 3682 kWh 1473 kWh 2209 kWh £388 £221 £609 £7,307 12.0 yrs £4,868
5 kW 4603 kWh 1841 kWh 2762 kWh £485 £276 £761 £9,134 12.0 yrs £6,085
6 kW 5524 kWh 2209 kWh 3314 kWh £582 £331 £913 £10,961 12.0 yrs £7,302
7 kW 6444 kWh 2578 kWh 3866 kWh £679 £387 £1,065 £12,788 12.0 yrs £8,519
8 kW 7365 kWh 2946 kWh 4419 kWh £776 £442 £1,218 £14,615 12.0 yrs £9,736

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, battery £/kWh = 700.

3 kWh battery 5 kW example → Annual benefit: £911, Upfront: £11,234, Break-even: 12.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1841 kWh 1105 kWh 736 kWh £291 £74 £365 £5,754 15.8 yrs £1,537
3 kW 2762 kWh 1657 kWh 1105 kWh £436 £110 £547 £7,581 13.9 yrs £3,355
4 kW 3682 kWh 2209 kWh 1473 kWh £582 £147 £729 £9,407 12.9 yrs £5,173
5 kW 4603 kWh 2762 kWh 1841 kWh £727 £184 £911 £11,234 12.3 yrs £6,992
6 kW 5524 kWh 3314 kWh 2209 kWh £873 £221 £1,094 £13,061 11.9 yrs £8,810
7 kW 6444 kWh 3866 kWh 2578 kWh £1,018 £258 £1,276 £14,888 11.7 yrs £10,628
8 kW 7365 kWh 4419 kWh 2946 kWh £1,163 £295 £1,458 £16,715 11.5 yrs £12,447

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, battery £/kWh = 700.

5 kWh battery 5 kW example → Annual benefit: £986, Upfront: £12,634, Break-even: 12.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1841 kWh 1289 kWh 552 kWh £339 £55 £395 £7,154 18.1 yrs £738
3 kW 2762 kWh 1933 kWh 829 kWh £509 £83 £592 £8,981 15.2 yrs £2,857
4 kW 3682 kWh 2578 kWh 1105 kWh £679 £110 £789 £10,807 13.7 yrs £4,976
5 kW 4603 kWh 3222 kWh 1381 kWh £848 £138 £986 £12,634 12.8 yrs £7,095
6 kW 5524 kWh 3866 kWh 1657 kWh £1,018 £166 £1,184 £14,461 12.2 yrs £9,214
7 kW 6444 kWh 4511 kWh 1933 kWh £1,188 £193 £1,381 £16,288 11.8 yrs £11,333
8 kW 7365 kWh 5155 kWh 2209 kWh £1,357 £221 £1,578 £18,115 11.5 yrs £13,452

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, battery £/kWh = 700.

7.5 kWh battery 5 kW example → Annual benefit: £1,009, Upfront: £14,384, Break-even: 14.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1841 kWh 1344 kWh 497 kWh £354 £50 £404 £8,904 22.1 yrs £-832
3 kW 2762 kWh 2016 kWh 746 kWh £531 £75 £605 £10,731 17.7 yrs £1,378
4 kW 3682 kWh 2688 kWh 994 kWh £708 £99 £807 £12,557 15.6 yrs £3,587
5 kW 4603 kWh 3360 kWh 1243 kWh £885 £124 £1,009 £14,384 14.3 yrs £5,796
6 kW 5524 kWh 4032 kWh 1491 kWh £1,062 £149 £1,211 £16,211 13.4 yrs £8,005
7 kW 6444 kWh 4704 kWh 1740 kWh £1,239 £174 £1,413 £18,038 12.8 yrs £10,214
8 kW 7365 kWh 5376 kWh 1988 kWh £1,416 £199 £1,614 £19,865 12.3 yrs £12,424

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, battery £/kWh = 700.

10 kWh battery 5 kW example → Annual benefit: £1,024, Upfront: £16,134, Break-even: 15.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1841 kWh 1381 kWh 460 kWh £364 £46 £410 £10,654 26.0 yrs £-2,461
3 kW 2762 kWh 2071 kWh 690 kWh £545 £69 £614 £12,481 20.3 yrs £-192
4 kW 3682 kWh 2762 kWh 921 kWh £727 £92 £819 £14,307 17.5 yrs £2,077
5 kW 4603 kWh 3452 kWh 1151 kWh £909 £115 £1,024 £16,134 15.8 yrs £4,347
6 kW 5524 kWh 4143 kWh 1381 kWh £1,091 £138 £1,229 £17,961 14.6 yrs £6,616
7 kW 6444 kWh 4833 kWh 1611 kWh £1,273 £161 £1,434 £19,788 13.8 yrs £8,885
8 kW 7365 kWh 5524 kWh 1841 kWh £1,454 £184 £1,638 £21,615 13.2 yrs £11,155

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, battery £/kWh = 700.

13.5 kWh battery 5 kW example → Annual benefit: £1,039, Upfront: £18,584, Break-even: 17.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1841 kWh 1418 kWh 423 kWh £373 £42 £416 £13,104 31.5 yrs £-4,791
3 kW 2762 kWh 2127 kWh 635 kWh £560 £64 £623 £14,931 23.9 yrs £-2,462
4 kW 3682 kWh 2835 kWh 847 kWh £747 £85 £831 £16,757 20.2 yrs £-132
5 kW 4603 kWh 3544 kWh 1059 kWh £933 £106 £1,039 £18,584 17.9 yrs £2,197
6 kW 5524 kWh 4253 kWh 1270 kWh £1,120 £127 £1,247 £20,411 16.4 yrs £4,527
7 kW 6444 kWh 4962 kWh 1482 kWh £1,306 £148 £1,455 £22,238 15.3 yrs £6,856
8 kW 7365 kWh 5671 kWh 1694 kWh £1,493 £169 £1,663 £24,065 14.5 yrs £9,186

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, battery £/kWh = 700.

Figures are illustrative and use the same method as the calculator above. For exact results, adjust your roof direction, tariff, and usage in the calculator.

Before you request quotes in Rhondda Cynon Taf

Use the numbers above to sanity-check installer quotes. The main things to compare are system size, battery assumptions, payback claims, MCS certification, DNO paperwork and export assumptions.

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Insights for CF43

Figures below are tailored to CF43 — click through for full league tables.

Big-Roof Britain Rank #1786 of 2182
4.4 kWp (UK avg 5.1 kWp)
~9 panels (≈430 W)
Solar Payback Index Rank #2501 of 2996
12.0 years (UK avg 10.8 years)
~£609 /yr • £7,307 upfront
Standing-Charge Drag Rank #2574 of 2996
34.6% (UK avg 26.6%) drag on savings
£211 fixed • ~£609 /yr value
Aspect Penalty View ranking →
East −23.6% West −18.4%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in CF43

Monthly generation per kilowatt of solar panels

kWh 31 Jan 44 Feb 80 Mar 108 Apr 119 May 116 Jun 116 Jul 102 Aug 84 Sep 55 Oct 38 Nov 28 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 44.6% of an average month (Dec–Feb)

Best / worst month: May / Dec

These figures show output per kilowatt (kW) of panels installed. In winter, a 1 kW system here produces about 34 kWh per month; the average month produces around 77 kWh. So a typical 4 kW home system would generate roughly 137 kWh in winter, or 307 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.33p/kWh
Daily Fixed Charge
57.84p/day
Local Sunshine
921kWh/kW
A 1 kW system generates ~921 kWh per year. A typical home uses ~2,700 kWh per year.
Typical System Size
4.0kW
For houses & bungalows in this area

Local Property Data

Property Types

Houses: 88% • Flats: 10% • Bungalows: 1% Based on 3,652 properties

Coverage

Rhondda Cynon Taf (100%)

Areas Covered

Ferndale and Maerdy, Tylorstown and Ynyshir, Treorchy

Data Sources & Assumptions

Solar yield: PVGIS (EU Joint Research Centre), January 2025 data

Electricity rates: Ofgem price cap, Q3 2026

Installation costs: DESNZ/MCS data, March 2026 (TIC)

Property data: EPC open data (Open Government Licence), aggregated

All estimates are typical values. Actual results vary based on your specific situation, roof characteristics, and usage patterns.

Compare nearby areas

Nearby in South Wales

CF41 (Rhondda Cynon Taf)
≈3.1 km away
Local sunshine: ~927 kWh/kWp · +1% vs CF43
CF40 (Rhondda Cynon Taf)
≈4.2 km away
Local sunshine: ~933 kWh/kWp · +1% vs CF43
CF42 (Rhondda Cynon Taf)
≈5.0 km away
Local sunshine: ~884 kWh/kWp · -4% vs CF43
CF45 (Rhondda Cynon Taf)
≈5.4 km away
Local sunshine: ~898 kWh/kWp · -2% vs CF43
CF44 (Rhondda Cynon Taf)
≈6.2 km away
Local sunshine: ~903 kWh/kWp · -2% vs CF43
CF39 (Rhondda Cynon Taf)
≈6.3 km away
Local sunshine: ~929 kWh/kWp · +1% vs CF43

Similar sunshine across the UK

LS8 (Leeds)
~921 kWh/kWp · +0% vs CF43
WF12 (Kirklees)
~920 kWh/kWp · -0% vs CF43
L18 (Liverpool)
~920 kWh/kWp · -0% vs CF43